How do you find the circumference of a ball?
Put a thread arround the ball and measure the thread's length.
The quickest way would be to actually measure it! Another way is to find how high/wide the ball is. This has to be done very accurately. Yoy could use parallel wooden boards (be careful not to squash the ball! The multiply the width/height of the ball by 3.14159265 (Pi). The formula is Pi x d (diameter) = circumference. A ball that is 30 cms in diameter will have a circumference of 94.248 cms.
Because the standard cue ball used in American pocket billiards is 2.25 inches in diameter, the circumference is approximately 7.07 inches. You find this answer by using the formula for circumference of a circle given by C= 2 x pi x radius, where pi equals 3.14 and radius is 2.25 divided by 2 or 1.125 inches.
Let's assume that your golf ball is 1.680 inches in diameter - the smallest size golf ball allowed in certain golfing associations. Then we know that the circumference of the golf ball will be the distance it would roll in one complete rotation. Circumference = pi * diameter Circumference = 3.14 * 1.680 in Circumference = 5.2752 inches = the distance that this particular golf ball would roll
To Find Diameter: Multiply circumference by 0.3183, or divide circumference by 3.1416 Other things to do with circles: To find Circumference: Multiply diameter by 3.1416, or divide diameter by 0.3183 To Find Radius: Divide diameter by 2, or multiply circumference by 0.15915, or divide circumference by 6.28318
1. take some string and wrap it once around the ping pong ball, make sure the string goes around the middle of the ball. pinch or mark the string where it touches the beginning of the string 2. now measure how long that segment of string is, this gives you the circumference of the ping pong ball 3. the formula to get the diameter if you know the circumference is circumference / pi = diameter…